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# If 3^m=81

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If 3^m=81 [#permalink]  08 Oct 2017, 00:49
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Question Stats:

0% (00:00) correct 0% (00:00) wrong based on 0 sessions

If 3^m = 81 then m^3 =

A. 9

B. 16

C. 27

D. 54

E. 64
[Reveal] Spoiler: OA

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Re: If 3^m=81 [#permalink]  09 Oct 2017, 01:45
Carcass wrote:

If 3^m = 81 then m^3 =

A. 9

B. 16

C. 27

D. 54

E. 64

we can re write as -
3^m = 81 = 3^4[/m]

Therefore m = 3

Now

m^3 = 4^3 =64
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Re: If 3^m=81 [#permalink]  09 Oct 2017, 07:00
pranab01 wrote:
Carcass wrote:

If 3^m = 81 then m^3 =

A. 9

B. 16

C. 27

D. 54

E. 64

we can re write as -
3^m = 81 = 3^4

Therefore m = 3

Now

m^3 = 4^3 =64

There is a typo.

Rewriting the equation as 3^m = 3^4, it results that m=4.

Then, what follow is right. m^3 = 4^3 =64.

Re: If 3^m=81   [#permalink] 09 Oct 2017, 07:00
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